<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>

<script type="text/javascript">

    var socket;
    if (window.WebSocket != null) {
        socket = new WebSocket("ws:/localhost:8899/ws");

        //收到服务器发过来的消息
        socket.onmessage=function (ev) {
            var ta = document.getElementById("responseText");
            ta.value = ta.value + "\n" + ev.data;
        }

        socket.open=function () {
            var ta = document.getElementById("responseText");
            ta.value = "连接开启";

        }
        socket.onclose=function () {
            var ta = document.getElementById("responseText");
            ta.value = ta.value + "\n" + "连接关闭!";
        }


    }else {
        alert("浏览器不支持WebSocket")
    }

    function send(message) {
        if (!window.WebSocket) {
            return;
        }
        if (socket.readyState == WebSocket.OPEN) {
            socket.send(message);
        }else {
            alert("连接尚未开启! ")
        }


    }

</script>
<form onsubmit="return false;">
    <textarea name="message" style="width: 400px;height: 200px;"></textarea>

    <input type="button" value="发送数据" onclick="send(this.form.message.value)">

    <h3>服务端输出</h3>
    <textarea id="responseText" style="width: 400px; height: 300px;"></textarea>

    <input type="button" onclick="javascript: document.getElementById('responseText').value=''" value="清理内容">

</form>


</body>
</html>